Secondary or storage battery.



B. FORD.

SECONDARY 0R STORAGE BATTERY.

APPLICATION FILED DEC. 22. I917.

Patented Feb. 12, 1918.

llI/VEA/TOI? TUNHTE ra s arnr BRUCE FORD, 0F PHILADELPHIA, PENNSYLVANIA.

SECONDARY on sronaen BATTERY.

Specification of Letters Patent.

Patented Fe -b.1211

Application filed December 22, 191?. Serial No. 208,488.

To all whom it may concern: v Be it known that I, BRUCE FORD, a oltlzen of the United States, and a resident of- I hereof, bot will be first described in connection with the embodiment of it chosen from other embodiments for illustration in the acconnvanying drawing, which is a sectional View of parts ofJnstorage battery showing in elcvatim'l and section features of the invention.

In the drawing l ilili cell cover of rubber material, metal terminal post extending through the cover and provided With an annular flange 3 having a marginal metal lip 4 confronting the underside of the and constituting a SOIh'Ql seat. 5, is a lcet of rubber material, as so called soft rubber, arranged beta-non the flange and cover and confined by the metal lip t against radial exlmnsion when compressed bythe scal-nut 6. Since the confining lip 4 is'o-E metal it is strong and well adapted to resist the stress exerted upon it by the gasket 5 and since the flange and terminal 330st are of metal, the lip can be readily formed as by casting and without affecting the terminal post or flange. of confining the gasket 5 against radial expansion is evident for if not confined and subjected to compression it would spread out radially and so break or tend to break the seal.

The portion of the underface of the cover upon which the gasket 5 bears is smooth and may consist of the smooth face of a boss,-as shown, or of the flat underside ofthe cover The advantage in cases where the boss is omitted. Inasmuch as the underface of the cover, or boas thereon, is smooth it can be readily formed and the cover made Without being under internal stress or strain and without being warped or deformed.

What I claim is:

1. In a storage battery the combination of a cell cover of relatively hard robber material, a seal-nut, a terminal post extdnding through the cover and provided with an annular flange having a marginal'metal lip confronting the underside of the cover, and a gasket of relatively soft rubber ma terial arranged between the flange and radial expansion When compressed by the scal-nut.

2. In a storage battery the combination of a cell cover of relatively hard material, a metal terminal post extending through. the cover and provided with a flange having a metal lip confronting the underside ofthc cover, and a gasket of relatively soft material arranged between the flange and the. cover and confined by the metal lip against radial expansion, and means for compressing the cover against the gasket to oonstitute a seal. v

BRUCE cover and confined bythe metal lip against 

